I heat up vinegar in the microwave and then use that to clean my shower. Also, after heating the vinegar, go over your microwave real quick...all the gunk from splatters should come off real easily now.
Try using Resolve carpet cleaner on clear shower doors to remove soap scum.
Or make ammonia solution of 1/2 C. ammonia in 1 gal. water. Pour solution into a spray bottle. Spray the shower door. Use a sponge or stiff bristle brush to scrub. Rinse well.
Warning: Keep room well ventilated while working! Ammonia can irritate your skin, so wear gloves while cleaning with this solution. Ammonia and bleach form a toxic gas when mixed together. Do NOT mix the two cleaners!
Also...if possible change to liquid soap it is a better alternative over bar soap. Liquid soap doesn't have any talc and talc is responsible for the build up of soap scum. Talc only adds volume to the soap without adding any value to it. Changing to liquid soap will reduce the frequency of needing to remove soap scum.
Good Luck!
Jill Marie
I totally forgot about this one, you can use car wax on the clean shower walls every six months or so to prevent soap scum from sticking. (Be sure NOT to get any of it on the shower floor!!!)